AES decryption - standard behavior broken

Hello,
just found out that my decrypt function of my mobile app is not working anymore.
I updated something completely different in the app, compiled it - put it in the store and now all my users cannot work anymore.
How is this possible to change a standard behavior without notice?
I cannot read or even know that the code has to be changed or works different.

Can you please fix the standard behavior of the crypt/decrypt functions or any other functions which was changed without asking?

Thanks a lot,
/Werner

Hi Werner,
I didn't get this request like several others, sorry.
Did you check this?